Magnetic holes in the solar wind

Details Magnetic holes in the solar wind Magnetic holes in the solar wind

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1921t&link_type=abstract

Journal of Geophysical Research, vol. 82, May 1, 1977, p. 1921-1924.

Astronomy and Astrophysics

Astronomy

54

Interplanetary Magnetic Fields, Magnetic Field Configurations, Solar Wind, Diamagnetism, Explorer 43 Satellite, Field Strength, Holes, Magnetic Measurement, Nonuniform Plasmas, Satellite Observation, Spaceborne Astronomy

Scientific paper

An analysis of high-resolution magnetic field measurements from the Goddard Space Flight Center magnetometer on Explorer 43 showed that low magnetic field intensities (less than 1 gamma) in the solar wind at 1 AU occur as distinct depressions, or 'holes', in otherwise nearly average conditions. These magnetic holes are new kinetic scale phenomena, having a characteristic dimension of the order of 20,000 km. They occurred at a rate of 1.5/d in the 18-day interval (March 18 to April 6, 1971) that was considered. Most magnetic holes are characterized by both a depression in /B/ and a change in the magnetic field direction, and some of these are possibly the result of magnetic merging. However, in other cases the direction, does not change; such holes are not due to merging but might be a diamagnetic effect due to localized plasma inhomogeneities.

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